Technical Specification

Technical

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BS1452 GRADE 250
(CAST IRON)

GENERAL:
A CLOSE GRAINED PREDOMINANTLY PEARLITIC GREY CAST IRON

USES:
SUITABLE FOR GLASS MOULDS,PUMP ROTORS AND HYDRAULIC PISTONS ETC.

CHEMICAL ANALYSIS:
C SI MN S P
2.8%- 3.5% 2%- 3% 0.4%- 1.0% 0.125% MAX 0.7% MAX

TYPICAL MECHANICAL PROPERTIES: (EXAMPLE ONLY)
SECTION SIZE TENSILE HARDNESS

SECTION SIZE TENSILE HARDNESS
10MM – 20MM 225 N/MM2 MIN 180 - 250 HB < 35MM DIA.
20MM – 40MM 195 N/MM2 MIN 180 - 230 HB < 100MM DIA
> 35MM DIA.
40MM – 80MM 170 N/MM2 MIN 170 - 220 HB > 100MM DIA.
80MM – 150MM 155 N/MM2 MIN ABOVE 150MM NOT SPECIFIED

HEAT TREATMENT & CONDITION
NOT APPLICABLE

SECTIONS
COMMERCIALY AVAILABLE IN ROUNDS, SQUARES AND FLATS.

RELATED SPECIFICATIONS
ASTM A48 CLASS 35B,DIN 1691 GG25,NFA32-101 Ft25D.

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